Whereas Equihash (as parametrized in Zcash) uses 200 bits of memory to store a hash,Cuckoo Cycle doesn't store hashes explicitly, but maintains 1 bit for each pair of hashes.Where Equihash solves problems of size a few million with a few hundred MB, Cuckoo Cyclecan tackle problems of size a few *billion* with the same memory thanks to a vastlymore intensive use of memory.

"Our solution is practical and ready to deploy: a reference implementation of a proof-of-work requiring 700 MB of RAM runs in 30 seconds on a 1.8 GHz CPU, increases the computations by the factor of 1000 if memory is halved, and presents a proof of just 120 bytes long."

Ram has no processing power. Unless you're talking about coins that requires you to hold content. You could create a ramdisk and set a part of your ram as disk space. But why bother, might as well use your hard drive which will hold a lot more content.